Unable to access server manager in Windows 2008 server

I have a Windows 2008 Server that won't load the server manager snap-in. When I try I load it I get the following error message

MMC could not create snap-in

MMC could not create snap-in. The snap-in might not have been installed correctly

Name: Server Manager

CLSID: FX:{18ea3f92-d6aa-41d9-a205-2023400c8fbb}

I've looked into this issue and I've discovered that it is potential a problem with .NET, which I have run a repair on without success. In addition to this I have run the Microsoft System Readyness tool which does seem to have highlighted any issues either.